Fluorescent paint



1'0 fluorescent materia to the arts Patented Feb. 7,1928.

UNITED STATES PATENT OFFICE.

LEROY J'- BUT'I'OLPH, OII' GRANTWOOD, NEW JERSEY, ASSIGNOB .1 COOPER nwm ELECTRIC COMPANY, 01' nonom, NEW JERSEY, L CORPORATION OI NEW m.

nuonxscnm rum.

80 Drawing.

Mylpresent invention relates to a fiuorescent pamt for use on theatrical costumes and scenery and in other displays wherein the parts painted are subjected to ultra violet 5 radiation for theactivation of such fluorescent material and its simultaneous display to spectators in the dark to produce fluorescent eifects. It relates particularly to a varnish composition for roperly ap lying such E0 be treated.

Heretofore in the use 0 fluorescent material for suchur oses particularly anthracene diflicult lias lieen experienced in securing a ood uorescent palnt or varnish due to the act that a vehicle or carrier could not be found which would dissolve both the anthracene and an adhesive therefor. This diificult was due in art to the lack of knowledge of a suitab e adhesive. I have discovered that benzene is the best solvent both for anthracene and forrubber and a very good varnish for fluorescent effects can be made of anthracene,.rubber, and a vehicle of benzene, the benzene being the solvent of both the anthracene and rubber in suitable quantities for making a very desirable flu. orescent oint. In the varnish of m invention I ad in addition to the above su tances a suitable amount of sulphur chloride for fixing the rubber cement quickly after it has been applied. The rubber I add in amounts suflicient to serve as an adhesive for the anthracene particles or crystals but in such small amounts that it will not mask the anthracene or cover it to prevent its fluorescent effect and I add it to the varnish mixture in the form of parava-r varnislh which is generally known and obtainable under that name in the trade. Paravar varnish comprises a vehicle of benzene and rubber with a suitable vulcanizer or fixersuch for example as sulphur chloride.

For dipplin fabrics such as dress materials and t e ike I prepare a thin varnish for example one of the following composition: 10 gale. benzene technical, lb. an-

Application filed December 17, 1924. Serial Io. 150,010.

thracene 90% pure sublimed, 1 qt. paravar varnishi For painting scenerly, woodwork, floors and so on I use a thic varnish or paint such for example as one of the following composition: 5 gals. benzene technical, 5 gals. paravar varnish, 1 lb. anthracene 90% pure sublimed.

The benzene evaporates very quickly after application and yet allows suflicient time for the pro er a lication of the paint or varnish. The ru r in the thin film in which it is left upon application of the varnish sets or vulcanizes very quickly due to the action of the vulcanizer or accelerator used therein such for example as sulphur chloride and due to the action of the elements of the air.

I'claim:

v 1. A fluorescent varnish com rising anthracen rubber and a solvent dirthe two.

2. A uorescent varnish comprising ben-- I zene, anthracene, and an adhesive for the anthracene.

3. A fluorescent aint comprisu'ig benzene,

.anthracene, and ru ber.

saturation in the benzene, rubber, and a vulcanizer for the rubber.

8. A fluorescent varnish comprising benzene 5 gals, garavar varnish 5 gals, and anthracene 1 l Signed at Hoboken in the county) of Hudson and State of New Jersey, ecember, A. D. 1924.

. LEROY J. BUTTOLPH. 

